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This morning's testimony in the capital murder trial of Curtis Vance centered on evidence measured in microns, as attorneys questioned employees of the Arkansas State Crime Lab about fluids and hairs found during the investigation into the murder of KATV anchorwoman Anne Pressly.

First on the stand was Lisa Channell, chief criminalist for the Crime Lab, who testified about hair evidence, and the efforts to isolate a DNA sample from items found at the crime scene and swabs collected during a rape examination of Pressly.

Channell said that though the swabs tested positive for a semen-specific antigen known as P-30, she was not able to find any sperm cells, and her testing was not able to connect the contents of the rape kit to a suspect.